<?php // $Id: overview.php,v 1.1.2.3 2008/10/02 15:29:57 poltawski Exp $
/**
 * Print an overview of groupings & group membership
 *
 * @author  Matt Clarkson mattc@catalyst.net.nz
 * @version 0.0.1
 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
 * @package groups
 */

require_once('../config.php');

$courseid   = required_param('id', PARAM_INT);
$groupid	= optional_param('group', 0, PARAM_INT);
$groupingid = optional_param('grouping', 0, PARAM_INT);

$returnurl = $CFG->wwwroot.'/group/index.php?id='.$courseid;
$rooturl   = $CFG->wwwroot.'/group/overview.php?id='.$courseid;

if (!$course = get_record('course', 'id',$courseid)) {
	error('invalidcourse');
}

// Make sure that the user has permissions to manage groups.
require_login($course);

$context = get_context_instance(CONTEXT_COURSE, $courseid);
require_capability('moodle/course:managegroups', $context);

$strgroups		   = get_string('groups');
$strparticipants	 = get_string('participants');
$stroverview		 = get_string('overview', 'group');
$strgrouping		 = get_string('grouping', 'group');
$strgroup			= get_string('group', 'group');
$strnotingrouping	= get_string('notingrouping', 'group');
$strfiltergroups	 = get_string('filtergroups', 'group');
$strnogroups		 = get_string('nogroups', 'group');
$strdescription	  = get_string('description');

// Get all groupings
if (empty($CFG->enablegroupings)) {
	$groupings  = array();
	$members	= array(-1 => array()); //groups not in a grouping
	$groupingid = 0;
} else {
	if (!$groupings = get_records('groupings', 'courseid', $courseid, 'name')) {
		$groupings = array();
	}
	$members = array();
	foreach ($groupings as $grouping) {
		$members[$grouping->id] = array();
	}
	$members[-1] = array(); //groups not in a grouping
}

// Get all groups
if (!$groups = get_records('groups', 'courseid', $courseid, 'name')) {
	$groups = array();
}

if (empty($CFG->enablegroupings)) {
	$groupwhere	= $groupid ? "AND g.id = $groupid" : "";
	$sql = "SELECT g.id AS groupid, NULL AS groupingid, u.id AS userid, u.firstname, u.lastname, u.idnumber, u.username
			  FROM {$CFG->prefix}groups g
				   LEFT JOIN {$CFG->prefix}groups_members gm ON g.id = gm.groupid
				   LEFT JOIN {$CFG->prefix}user u ON gm.userid = u.id
			 WHERE g.courseid = {$course->id} $groupwhere
		  ORDER BY g.name, u.lastname, u.firstname";
} else {
	$groupingwhere = $groupingid ? "AND gg.groupingid = $groupingid" : "";
	$groupwhere	= $groupid ? "AND g.id = $groupid" : "";
	$sql = "SELECT g.id AS groupid, gg.groupingid, u.id AS userid, u.firstname, u.lastname, u.idnumber, u.username
			  FROM {$CFG->prefix}groups g
				   LEFT JOIN {$CFG->prefix}groupings_groups gg ON g.id = gg.groupid
				   LEFT JOIN {$CFG->prefix}groups_members gm ON g.id = gm.groupid
				   LEFT JOIN {$CFG->prefix}user u ON gm.userid = u.id
			 WHERE g.courseid = {$course->id} $groupingwhere $groupwhere
		  ORDER BY g.name, u.lastname, u.firstname";
}

if ($rs = get_recordset_sql($sql)) {
	while ($row = rs_fetch_next_record($rs)) {
		$user = new object();
		$user->id		= $row->userid;
		$user->firstname = $row->firstname;
		$user->lastname  = $row->lastname;
		$user->username  = $row->username;
		$user->idnumber  = $row->idnumber;
		if (!$row->groupingid) {
			$row->groupingid = -1;
		}
		if (!array_key_exists($row->groupid, $members[$row->groupingid])) {
			$members[$row->groupingid][$row->groupid] = array();
		}
		if(isset($user->id)){
		   $members[$row->groupingid][$row->groupid][] = $user;
		}
	}
	rs_close($rs);
}


// Print the page and form
$navlinks = array(array('name'=>$strparticipants, 'link'=>$CFG->wwwroot.'/user/index.php?id='.$courseid, 'type'=>'misc'),
				  array('name'=>$strgroups, 'link'=>'', 'type'=>'misc'));
$navigation = build_navigation($navlinks);

/// Print header
print_header_simple($strgroups, ': '.$strgroups, $navigation, '', '', true, '', navmenu($course));
// Add tabs
$currenttab = 'overview';
require('tabs.php');

/// Print overview
print_heading(format_string($course->shortname) .' '.$stroverview, 'center', 3);

echo $strfiltergroups;

if (!empty($CFG->enablegroupings)) {
	$options = array();
	$options[0] = get_string('all');
	foreach ($groupings as $grouping) {
		$options[$grouping->id] = strip_tags(format_string($grouping->name));
	}
	popup_form($rooturl.'&amp;group='.$groupid.'&amp;grouping=', $options, 'selectgrouping', $groupingid, '', '', '', false, 'self', $strgrouping);
}

$options = array();
$options[0] = get_string('all');
foreach ($groups as $group) {
	$options[$group->id] = strip_tags(format_string($group->name));
}
popup_form($rooturl.'&amp;grouping='.$groupingid.'&amp;group=', $options, 'selectgroup', $groupid, '', '', '', false, 'self', $strgroup);


/// Print table
$printed = false;
foreach ($members as $gpgid=>$groupdata) {
	if ($groupingid and $groupingid != $gpgid) {
		continue; // do not show
	}
	$table = new object();
	$table->head  = array(get_string('groupscount', 'group', count($groupdata)), get_string('groupmembers', 'group'), get_string('usercount', 'group'));
	$table->size  = array('20%', '70%', '10%');
	$table->align = array('left', 'left', 'center');
	$table->width = '90%';
	$table->data  = array();
	foreach ($groupdata as $gpid=>$users) {
		if ($groupid and $groupid != $gpid) {
			continue;
		}
		$line = array();
		$name = format_string($groups[$gpid]->name);
		$jsdescription = addslashes_js(trim(format_text($groups[$gpid]->description)));
		if (empty($jsdescription)) {
			$line[] = $name;
		} else {
			$jsstrdescription = addslashes_js($strdescription);
			$overlib = "return overlib('$jsdescription', BORDER, 0, FGCLASS, 'description', "
					  ."CAPTIONFONTCLASS, 'caption', CAPTION, '$jsstrdescription');";
			$line[] = '<span onmouseover="'.s($overlib).'" onmouseout="return nd();">'.$name.'</span>';
		}
		$fullnames = array();
		foreach ($users as $user) {
			$fullnames[] = '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$user->id.'&amp;course='.$course->id.'">'.fullname($user, true).'</a>';
		}
		$line[] = implode(', ', $fullnames);
		$line[] = count($users);
		$table->data[] = $line;
	}
	if ($groupid and empty($table->data)) {
		continue;
	}
	if (!empty($CFG->enablegroupings)) {
		if ($gpgid < 0) {
			print_heading($strnotingrouping, '', 3);
		} else {
			print_heading(format_string($groupings[$gpgid]->name), '', 3);
			print_box(format_text($groupings[$gpgid]->description), 'generalbox boxwidthnarrow boxaligncenter');
		}
	}
	print_table($table, false);
	$printed = true;
}

print_footer($course);
?>
